Saw-gummer



UNITED STATES PATENT OFFIOE.

L. A. DOLE, OF SALEM, OHIO, ASSIGNOR TO DOLE. SILVER AND FELGH, OF SALEM, OHIO.

SAW-GUMMER.

Specification of Letters Patent No.

To all whom t may concern:

Be it known that I, L. A. Donn, of Salem, in the county of Columbiana and State of Ohio, have invented a new and Improved Implement or Device for Gumming Saws; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this speciiication, in which- Figure l, is a vertical section of my improvement, (fr), (zr), Fig. 3, showing the plane of section. Fig. 2, is a frontI view of ditto. Fig. 3, is a plan or top view of ditto.

Similar letters of reference indicate corresponding parts in the several figures.

The nature of my invention consists in arranging the cam or moving crank which operates the male die or punch below the stationary die, either in or below the die block, so as to draw down the male die or punch by means of a bar traversing in said die block. Also in arranging a cam lever with a movable fulcrum in combination with an opening in the die block in which it is marked, so constructed and arranged as to traverse the bar with a positive motion in each direction which moves the male die or punch as the lever is vibrated.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A, represents the stock or body of the implement. This stock is formed of cast iron. It may be of rectangular form, and rest upon a base B, which may be cast with it so as to form the stock or die block and base in one piece.

C, represents a vertical bar, of rectangular form. This bar works in a recess made or formed in the stock or body A, and has its lower'end fitted in a fork, at the lower end of a lever D, the lower end of said lever having circular shoulders, (a), upon it, which form the fork, and between which, the lower end of the bar C, is secured by a pin (o), which passes eccentrically through the shoulders (a), as shown in Fig. l, and by dotted lines in Fig. 2. The shoulders (a), (a), of the lever D, rest upon the base B, an opening (c), being allowed in the lower part of the body or stock to receive the shoulders, as shown plainly in Figs. l, and 2. A slot (d), is also made in the base B, to allow the lever D, to be depressed to raise the bar C, and male die E, with a positive motion by the action of the shoulders (a) a) on the base B, each side of the slotd.

The upper end of the bar C, is made to project over the opening in the die F, and the punch or male die E, is litted under this projection on the bar C, as shown in dotted lines in Fig. l, and the die is fastened to the bar C, by the strap a, o provided with a set screw so arranged as to draw the die E against the bar C, and hold it firmly. The bar C, is held in the recess in the stock A, by the plate H fastened to the stock A by four screws.

In the upper end of the stock or body A, there is placed a stationary die F. This die is fitted in grooves in the stock, and is secured in proper position by a pin (c), which passes vertically through a lip (f), on the stock or body A. The die E, which is the male die is of triangular form, corresponding to the form of the spaces between the teeth of the saw, and the die F, which is the female die, corresponds inversely in form with the male die.

G, is a passage made in the stock A, and communicating with the lower end of the die F for the chips formed in punching or gumming a saw to escape from the die and stock.

The saw to be gummed, shown in red, is laid latwise upon the die F, and the saw is gummed, or the spaces between the teeth cut out, by depressing the outer end of the lever D, the die E, being brought down, owing to the eccentric attachment of the bar C, to the lever D, which works against the underside of the stock A, in the opening (0,) the shoulders (c), bearing upon the base B, and serving as a fulcrum for the lever D to raise the bar C, with a posit-ive mot-ion. The cut pieces from the saw pass down through the passage G.

By arranging the cam or moving crank below the die either in or below the die stock so as to draw down the punch or male die by means of a bar traversing in said die stock substantially in the manner described, I am enabled to make a machine of a given power with one half the weight of metal heretofore required for the same purpose, and with three fourths of the labor, so that one of my machines adapted to any particular kind of work, only costs live eighths, or a little more than half as much as those heretofore made. Besides my machines are far better, as well as cheaper and can be operated with far less power than is usually employed for similar purposes; and further by fastening the male die to the edge of a bar that is so thin, that it willreadily enter the scores between the teeth of a common sawmill saw, and allow the saw to be vibrated as may be desirable in gumming it, is a great advantage which will readily be appreciated by those skilled in the process. Besides it brings the cutting die, or punch so near the traversing bar that carries it, that the cam which traverses the bar acts almost directly under the dies, and with a very short lever, acting with great force in proportion to the power applied to it. I contemplate that the cam or crank used to traverse the bar and punch, may be arranged either in, or below the die block as may be preferred.

I believe I have described the construction and operation of my machine or gumming `male die, by means of a bar traversing in said die block, substantially as described.

2. I claim the cam lever, I), with a movable fulcrum in combination with the opening c, so constructed and arranged as to traverse the bar, C, with a positive motion in each direct-ion, as the lever is vibrated, substantially as described.

L. A. DOLE.

lVitnesses A. H. BATTIN, M. L. EDWARDS. 

